6.The sole problem that the Milankovitch theory can not solve is to explain why the ice age frequency should shift from one to another.
7.Carbon dioxide can be locked artificially into sea ice to eliminate the greenhouse effect.
8.Some scientists are not ready to give up the Milankovitch theory though they havent figured out which mechanisms amplify the changes in solar heating.
9.Both Edwards and Ehrlich believe that there is no practical way to test when the solar temperature oscillation begins and when ends.
Questions 10-14
Complete the notes below.
Choose one suitable word from the Reading Passage above for each answer.
Write your answers in boxes 10-14 on your answer sheet.
The standard view assumes that the opposing pressures of gravity and nuclear fusions hold the temperature 10in the suns interior, but the slight changes in the earths 11alter the temperature on the earth and cause ice ages every 100,000 years.A British scientist, however, challenges this view by claiming that the internal solar magnetic 12can induce the temperature oscillations in the suns interior.The suns core temperature oscillates around its average temperature in 13lasting either 100,000 or 41,000 years.And the 14interactions within the suns magnetic field could flip the fluctuations from one cycle length to the other, which explains why the ice ages changed frequency a million years ago.
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